Not sure how to put this without coming over all advert voiceover. Perhaps a little old-time personal testimony? A year or so ago I discovered some excellent boxer shorts: soft cotton, amusing colours, button fly and comfortably cut. They were pricey but I bought them in a sale for around £10 each. Well, I need some new ones now and looked up the brand on the web: Coton Doux, from Paris.
Keep your excitement under control as they're on sale (as is every French retail business if it has sales-driven marketing: they have legally-designated sale periods). You can now buy these terrific boxers for just €9 each (plus p&p). I don't think this is too pricey: these are very good quality shorts, with dozens of colour options - pictures below.
I address this recommendation to women readers too: they would make a nice gift, though perhaps not sufficient for birthdays. Unless, that is, the man you know gets as much satisfaction from having nice boxer shorts as I do (I'm hoping this is known as 'just gay enough', but I'm sure someone will put me right).